How will this affect non-american internet users, your suggested note to members of Congress specifically mentions Americans for obvious reasons but will this affect others?
While it may be a little on the assumptive side, the international community looks to the United States to set the example and establish a standard, mostly due to our current economic power. Other nations may attempt to follow suit in allowing monopolistic ISPs to balkanize the internet in a cash grab, providing additional restrictions and trammeling access. You've seen that "content not available in your region" notice before, right? While that currently originates on the server side of things, the elimination of net neutrality is likely to produce those types of warnings on a greater level of content from the ISP side, domestically and internationally.
Outside of the United States, you can't influence the vote - legally. Part of the process of muddying the waters on public commentary received through the online method was actually to point to hundreds of thousands of complaints received originating from Russian IP addresses, effectively allowing those hoping to destroy net neutrality to neutralize online feedback about the issue. I would imagine additional response from the greater international community would be met with increased skepticism.If so how can we influence the vote?